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No. 624,323. Patented May 2, |899. H. L. GAVEAU.

TYPE WRITING MACHINE.

(Application led Dec, 29, 1897.)

' ets-sheet (No Model.)

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Patented Ma'y'2, 1899.

(Application Bled. Dec. 29, 1897.)

4 Sheets-Sheet 2.

(No Model.)

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No. 624,323. Y Patented May 2, |899.

` H. L. GAVEAU. TYPE WRITING MACHINE.

(Application led Dec. 29, 1897.) (No Model.) 4 Sheets-Sheet 3.

No. 624,323. Patented May 2, i899.

- II. L. GAVEAU.

TYPE WRITING MACHINE.

(Application tiled. Dec. 29, 1897.)

4 Sheets-Shadi 4.

(N0 Model.)

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Nrrn STATES HENRI LUCIEN -lAVFAU, OF PARIS, FRANCE.

TYPE-WRITING MACHINE.

f. SPECIFICATION forming part of Letters-Patent No. 624,323, dated May2, 1899.

Application filed December 29, 1897. Serial No. 664,378. (No model.)

To @ZZ whom Zt may concern:

Beit known that I, HENRI LUCIEN .GAvEAiL of the city of Paris, France, have invented Improvements in Type-VVriting Machines, (for which I have obtained Letters Patent in France for fifteen years, dated March G, 1897, No. 264,705,) of which the following is a full, clear, and exact description.

rllhis invention relates to type-writing machines; and the improvements have particularly for their object aineans whereby to equalize the spacing between the letters by making the feed of the paper proportional to the width of the character printed, the feed for capitals differing from that for the small letters and the feed for letters with one downstroke, such as i, 1, t, differing from that for letters with several downstrokes, such as m, w.

Reference is to be had to the accompanying drawings, forming part of this specification, wherein- Figure 1 is a front elevation, Fig. 2 a plan, and Fig. 3 a side elevation, of the improved type-writing machine. Fig. 4. isV a vertical section on line 1 2, Fig. 2, showing the typelever-operating mechanism.

` The same letters and numerals of reference indicate the same parts in all the figures.

o, is the base, ZJ the key-levers, and c the keys. The levers o are raised by springs cZ and are connected by links e to the type-leversf, pivoted to an arc-shaped frame g, supported on pillars h.

The mechanism comprises cranked rocking bars I, having return ends, which are pivoted at 7c on the base a, the intermediate portions of these bars, which extend beneath the keylevers, being so cranked or shaped as to be adapted to be depressed each by any one of the levers of a given set, the levers being supposed to be divided into three sets, according to the width of the type they carry, a different rocking cross-bar corresponding to each set. These cranked bars t' are raised by springs Z and connected by links m with as many corresponding levers n, each lterminated by a pawl o, adapted to engage with the pins of a lantern-wheel p, fast on the leading screwshaft q, by the revolution of which longitudinal motion is imparted to the roller r,.carry ing the paper, the springs Z, links m, levers n., pawls o, and lantern-wheels being duplicated at the two sides of the machine, the two sets of a pair acting together as one at the opposite ends of the screw-shaft.

When a key c is depressed, its lever b bears on and depresses the corresponding cranked bar t', which, in oscillating about its centers 7s, actuates, through links m, the pawl-levers n, whereof the pawls slip over the pins of wheels p. When the key rises, the cranked bar is also raised by its springs Z, and the pawls 0 turn the wheels p and rotate the leading screw q a certain extent, thereby giving a longitudinal or letter-spacing motion to roller fr, the extent of this motion depending on which key has been depressed, and consequently on which cranked bar Z and pair of pawls o have been actuated, the different bars t' being adapted to give different extents of motion to the lantern-wheels 19 and screw- Y shafts q. The interverbal spacing is effected by a spacing-key 4, connected to one of the cross-bars t'. A ratchet-wheel s is fixed to one end of the roller o", and with it engages a pawl t, mounted on a ring u, loose about the screw-shaft q and provided with an arm and slid e-block fo, engaged in a guide-slot 0c, mounted on a fork y, connected to a lever z, pi'voted at Z, and terminated in a line-spacing key 2. When this key is depressed, the guide is raised and carries up with it the pawl t, which slips over the teeth of the Wheel s, and as soon as the line-spacing key 2 is released the parts are returned to their original position by a spring 3, the downward motion of guide a: imparting, through pawl t and ratchetwheel s, partial rotation to roller rfor shifting the paper the distance required for interlinear spacing.

When a key-lever is struck, the type-lever f, connected thereto byits link c, is depressed, as shown in broken lines in Fig. 4, and the type strikes the paper through an inked ribbon 5, which gives the impression. This ribbon is attached by its extremities to roller r and is normally held out of Contact with the paperby a central type-guide G, having a conical hole for guiding the type and insuring proper alincment and position. The guide 6 is depressed along with the type, being for this' purpose mounted on an elbow-lever 8, one

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member of which is vconnected by a 1ink'9 with across-bar passing underand actuated by all of the key-levers b, while to the other member of the elbow-lever 8 a spring ll is connected, the rise of the guide 6 being limf ited by a bar 12, mounted in arms carried b y rings 13, loose about'the'screw q.

When a key-1eve1 is stru ck, the corresponding type is depressed and strikes the ribbon:- through the guide-hole 7 of guide 6,Which is also depressed, thus producing the impres" sion on the paper. At same time the key-,7. lever has depressed the corresponding cross bar i and shifted the V'corresponding paWl 0 i back over the pins of Wheel p. When the keylever rises,-the type-lever fand guide 6i rise andthe -`pawl o turns Wheel p and screw-1 sha'ft q, Vthus moving roller r along a distance'g proportional'to the Width of the characterglvwhich hasbeen thus printed.

I claim- YIn atype-Writing machine, thercombinaton of feed mechanism whereby the extent of feed is Varied according to the Width of the letter printed, so as to obtain uniformity of spacing, such mechanism comprising a plurality of key f levers, cross-bars adapted to be operated by certain only of said key-levers,a separate pawl connected to -each of said cross-bars and a Wheel with which said pawls are adapted to coperate to shift the platen to a greater or lessextentaccordingly as vone -or another of said pawls 'is operated.

The-foregoing speciication of my improve- Hments in type-Writing machines signed by me this 14th day of December, 1897.

vHENRI ELUCIEN GAVEAU. Witnesses:

:EDWARD P. -MAeLEAm MAURICE HENRI P1GNET-- 

